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I have searched and found a few others with this problem and I could not find any solution that worked for me.
With Microsoft 365 personal can you access the calendar using the Outlook Android app? When I try to login to add my account I receive this error.
An error occurred during authentication. Please try again later.
Tried using the app to contact support, but just get a spinning blue circle saying contacting to support.
Tried clearing cache, deleting Outlook and reinstalling different WiFi and mobile data, changing password and I keep receiving the error.
I can login using other apps and with the browser. Outlook is the only problem.
Using Outlook for Android in business environments for email and scheduling
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I am also having same problem I can login my company exchange mail using other apps like Gmail and web browser but unable login using outlook
Brilliant - working for me now as well. At last! Thanks for sharing.
Good news! By chance I just tried to install Outlook for Android on my Xiaomi 13 phone for the umpteenth time. Surprise! Surprise! My Yahoo Sky email account was accepted and I was able to get the Password screen without an error message appearing. My password was accepted and my Yahoo Sky email account is now working as it did before on my previous Android phones. Ironically I was getting used to the Yahoo Email App but I've now deleted it and am using Outlook which has been my preferred email account for many years. Thanks to Microsoft for finally sorting out the bug.
I have exactly the same issue. After 3 attempts at clearing all data, uninstalling Outlook, and rebooting the android phone (Galaxy S20 Ultra), I narrowed down the fault to trying to add my sky email account. Other accounts (including yahoo, Outlook, and gmail) all work without flipping out before allowing me to key in a password.
Also having the same issue - custom domain. Can't log in using password or authenticator app but the website (in browser) works fine. Do you create a new outlook email and then link that to your custom email? Or does Microsoft just not work with custom domains? Seems stupid.